Webb, James, author
Bantam Books, 2001
Buku Teks
Thompson, W. Scott (Willard Scott), 1942-, author
University of Queensland Press, 1977
Buku Teks
Pike, Douglas, 1908-1974, author
MIT Press, 1968
Buku Teks
Routledge, London: Routledge, 1991
Buku Teks
Draper, Theodore, 1912-2006
Penguin Books, 1967
Buku Teks